CONCEPTUAL PHYSICS 13TH EDITION
COMPLETE TEST BANK AND SOLUTIONS
MANUAL BY PAUL G HEWITT VERIFIED
ANSWERS A+
◉ The amount of momentum an object has depends on Answer: 1)
how much stuff is moving (mass)
2) how fast stuff is moving (speed/velocity)
◉ Standard metric unit of momentum is Answer: kg * m / s
◉ Is momentum scalar or vector? Answer: Vector
◉ A car accelerates from rest, changing its momentum. The Earth's
momentum changes by
a) a larger amount
b) the same amount
c) a smaller amount
d) depends on interaction of two Answer: b) the same amount
, p=F*t
Force exerted by car and Earth are equal and opposite, hence the
Force cancels out.
The Time these forces were exerted are the same.
same time * same force = same momentum
◉ Suppose the entire population of the world gathers in ONE spot
and everyone jumps at the sound of a prearranged signal. While
everyone is in the air, does the Earth gain momentum in the opposite
direction?
a) No, the inertial mass of Earth is so large that the planet's change
in motion is imperceptible
b) Yes, however the change in momentum of Earth is much less than
that of all the jumping people because of Earth's large inertial mass
c) Yes, Earth recoils like that of a rifle firing a bullet with a change in
momentum equal to and opposite of people
d) It depends Answer: c) Yes, Earth recoils like that of a rifle firing a
bullet with a change in momentum equal to and opposite of people
COMPLETE TEST BANK AND SOLUTIONS
MANUAL BY PAUL G HEWITT VERIFIED
ANSWERS A+
◉ The amount of momentum an object has depends on Answer: 1)
how much stuff is moving (mass)
2) how fast stuff is moving (speed/velocity)
◉ Standard metric unit of momentum is Answer: kg * m / s
◉ Is momentum scalar or vector? Answer: Vector
◉ A car accelerates from rest, changing its momentum. The Earth's
momentum changes by
a) a larger amount
b) the same amount
c) a smaller amount
d) depends on interaction of two Answer: b) the same amount
, p=F*t
Force exerted by car and Earth are equal and opposite, hence the
Force cancels out.
The Time these forces were exerted are the same.
same time * same force = same momentum
◉ Suppose the entire population of the world gathers in ONE spot
and everyone jumps at the sound of a prearranged signal. While
everyone is in the air, does the Earth gain momentum in the opposite
direction?
a) No, the inertial mass of Earth is so large that the planet's change
in motion is imperceptible
b) Yes, however the change in momentum of Earth is much less than
that of all the jumping people because of Earth's large inertial mass
c) Yes, Earth recoils like that of a rifle firing a bullet with a change in
momentum equal to and opposite of people
d) It depends Answer: c) Yes, Earth recoils like that of a rifle firing a
bullet with a change in momentum equal to and opposite of people
